[Index] [Quick Jump] Package maintainers For package maintainers and hackage trustees Candidates TypeScript offers Utility Types, which allows creating a type from another. There is no way of doing this in Haskell. You have to maintain all your types yourselves, and handle conversions from one to another yourself. type-machine brings a solution to this problem. Using Template Haskell, generate new types using Type-Script-inspired functions like omit, pick and record. It can also generate a conversion type-class that allows you to access fields and convert one type to another.